DISCOUNT_NOT_FOUND = "兑换码不存在"
DISCOUNT_ALREADY_USED = "兑换码已使用"
DISCOUNT_LIMIT = "兑换码数量限制"
DISCOUNT_NOT_START = "兑换码未开始"
DISCOUNT_EXPIRED = "兑换码已过期"
ORDER_DISCOUNT_ALREADY_USED = "订单已使用兑换码"
DISCOUNT_LIMIT_EXCEEDED = "兑换码使用次数已达到上限"
DISCOUNT_ALREADY_EXPIRED = "兑换码已过期"
DISCOUNT_NOT_APPLY = "兑换码不适用该课程"
DISCOUNT_COUNT_NOT_ZERO = "兑换码数量必须大于0"
